Alert archive / Georgia / Flash Flood Warnings in 1990

Flash Flood Warning 35, NWS Atlanta, GA

March 16, 1990Catoosa County, Whitfield County, Georgia

NWS Atlanta, GA issued this flash flood warning at Mar 16, 1990, 4:47 PM EST for Catoosa County, Whitfield County, Georgia. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Mar 16, 1990, 4:47 PM EST (21:47 UTC)
Expired
Mar 16, 1990, 8:45 PM EST
In force
4 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Catoosa County, GA, Whitfield County, GA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 12:00Z, 9.8 hours before the alert went out and 190 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Athens Municipal, GA at 12:00Z on 1990-03-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Athens Municipal, GA at 12:00Z on 1990-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 352 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
18 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
663 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
352 m²/s²
0-3 km storm-relative helicity
390 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KCHA 162149
FFWCHA
GAC047-083-295-313-170145-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE
447 PM EST FRI MAR 16 1990
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  845 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS
 
IN NORTHWEST GEORGIA
 
   ...CATOOSA COUNTY...DADE COUNTY...WALKER COUNTY...WHITFIELD COUNTY
 
WEATHER RADAR INDICATES WIDESPREAD MODERATE RAINS CONTINUING OVER
THESE UPPER NORTHWEST GEORGIA COUNTIES AS MODERATE TO OCCASSIONALLY
HEAVY RAINS CONTINUE TO MOVE OUT OF ALABAMA INTO THESE COUNTIES.
 
REPORTS FROM THESE COUNTIES INDICATE STREAMS AT OR ABOVE BANKFULL
WITH SEVERAL ROADS ALREADY UNDER WATER.
 
RAINS WILL CONTINUE WELL INTO THE NIGHT OVER NORTHWEST GEORGIA.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 16, 7:25 AM ESTFlash Flood WarningFFCPolk5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCFannin, Gilmer, Gordon, Murray, Pickens5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCChattooga, Floyd5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCHaralson5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCBartow5 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCBartow, Floyd, Gordon, Pickens, Polk6 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCFannin, Gilmer, Murray6 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCChattooga6 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCHaralson6 hr
Mar 16, 4:37 PM ESTFlash Flood WarningFFCBartow, Floyd, Haralson, Polk5 hr
Mar 16, 4:37 PM ESTFlash Flood WarningFFCGilmer, Gordon, Pickens5 hr
Mar 16, 4:37 PM ESTFlash Flood WarningFFCFannin, Murray5 hr
Mar 16, 4:37 PM ESTFlash Flood WarningFFCChattooga5 hr
Mar 16, 4:47 PM ESTFlash Flood WarningFFCDade, Walker4 hr
Mar 16, 5:40 PM ESTSevere Thunderstorm WarningFFCFulton50 min
Mar 16, 6:31 PM ESTTornado WarningFFCRockdale29 min
Mar 16, 6:46 PM ESTTornado WarningFFCNewton, Walton59 min
Mar 16, 6:54 PM ESTFlash Flood WarningFFCCobb, Douglas, Fulton4 hr
Mar 16, 6:54 PM ESTFlash Flood WarningFFCDeKalb4 hr

Nearby

Flash Flood Warnings in Georgia, 1990Every flash flood warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.